Alarm clock



0. ROSEKE.

ALARM CLOCK.

APPLICATION FILED FEB.13, I920.

j r e m JH mw m M I a A h/. I: m 02 m .used in the clock of my aforesaidapplica- PATENT ornca.

OTTO BbSEKE, 0F STUTTGABT, GERMANY.

ALARM CLOCK.

Specification of Letters I'atentu Patented Aug. 1, 1922.

Application filed February 13, 1920. Serial No. 358,490.

To all whom it may concern:

Be it known that I, Orro Bosnian, a citizen of the German Republic,residing at Stuttgart, Wurttemberg, Germany, have invented certain newand useful Improvements' in Alarm Clocks (for which I have June 11,1919, andthis present application in some respects may be considered animprovement on the alarm clock therein disclosed. I

In my aforesaid application, there is pro vided a special controller forbringing the preliminary alarm intoaction and for variably controllingthe nature of the alarm as the period for the regular alarm isapproached, bein in addition to the controller of the usual 2. arm.

The present invention has obviated the necessity of providing twocontrollers for the two alarm mechanism and in so doing has materiallysimplified the structure of the clock, making it more positive andreliable in operation and more economical to manufacture. This has beendone by providing means on the usual alarm controller for reaching toand controlling the preliminary alarm. It should be-noted in connectionwith the above that the device in my aforesaid application is efficientand satisfactory and that the present invention is a further step inadvancement to perfection. It should also be noted that in the clock andwatch industries where the articles are manufactured by the thousands,even a slight saving in material and labor on each article is animportant advantage in itself.

The present invention has a further im: provement, namely, the provisionof a stamped star wheel for actuatlng the preliminary alarm instead'ofthe pegged wheel tion.

' In the acompanying drawings which show by way of example oneembodiment of my invention Figure 1 is a front view of an alarm clockshowing my invention applied thereto, the parts not essential to theunderstanding of the present invention being omitted.

Fig. 2 is a detail view of the controller.

Fig. 3 is another detail of'the controller, looking at the same fromabove.

Fig. 4 is a plan of such portions of the alarm clock as are necessary tothe understanding of this invention.

Fig. 5 is a front view similar to Fig. 1, but showin the preliminaryalarm mechanism in the position it occupies except when functioning.

Before describing the structure of the illustrated embodiment of thepresent invention, atttention is called to the fact that the continuousor usual alarm may be of the conventional or usual type having its ownusual or conventional hammer operating mechanism,

'As illustrated, the hammer a of the preliminary alarm is mounted on apivot b and is weighted on one side so as to have a normal tendency tofall against and strike a blow on the usual bell c to give single strokesignals.

Depending from the hammer a there is a wire or other suitable arm 0having at its lower end a head 6 adapted to move into the path of a starwheel d which is connected by gears 11 and h to the time work mechanismof the clock so as to continuously rotate. The star wheel d takes theplace of and is operated in the same manner as the pegged operatingwheel of the clock of my aforesaid application and similarly" serves asthe means for moving the hammer to position from which it will fall tostrike .the bell when released.

The controller 9 for the usual alarmmechanism is constituted by a springsecured at "its lower end to the frame work and engaging at its upperend the time. wheel 1. of the usual alarm mechanism. The controller ghas a lug 2 bent from its upper end for engaging and releasing theusualalarm mechanism at the proper time when a notch 3 in the time wheel 1 isopposite a pin 4 of the alarm setting mechanism,

the notch 3 permitting the controller to move sidewise to withdraw thelug 2 and permit the usual alarm to operate. In accordanoe with m aforesaid invention, the notch 3 is not'a rupt as is usual in alarmclocks but has a gradual slope for the purpose of gradually increasingthe force of impact of the hammer a. Thus the time wheel 1 and thecontroller g will be gradually moved to withdraw its lug 2.

The present invention provides upon this controller another lug, lugwhich reaches to and engages the arm 0 of the hammer (1 so that thehammer can be controlled thereby. The portion of the lug which engagesthe arm a is sloping so that as the controller y is permitted to move bythe slope on the time wheel 1 the range of movement of the hammer isgradually increased with the effect that the force of impact of thehammer against the bell increases. When the preliminary alarm isfunctioning the star wheel (I engaging the head 6 of the arm raises thehammer weight and then releases it. the sloping lug f on the controllerg limiting the return movement of the hammer and thus modifying theeffective impact of the hammer. As the time progresses the lug fgradually permits a greater movement of the hammer and thus causes thesound of the bells to be louder. During the greater part of the time,that is when the preliminary alarm is not functioning, the lug fholdsthe arm 1' in the position shown in Fig. 5 in which the head e isout of the range of the star wheel and therefore is not operatedthereby.

The usual or conventional means for rendering the alarm ineffective maybe used. 7

Variations may be resorted to within the scope of my invention andportions of the improvements may be used without others.

I claim as my invention:

In an alarm clock, a preliminary alarm mechanism comprising an alarmoperatin arm. a hammer connected thereto, a head carried by said arm;time works comprising a gear-wheel; and a star wheel geared to said gearwheel and adapted to engage the head carried by the alarm operating armto move said arm in preparation to giving an alarm and to subsequentlyrelease said arm to cause the alarm to be given.

In testimony whereof I atfix my signature in presence of two witnesses.

OTTO ROSEKE.

Witnesses IIILDEGARD SEELIGER, ERIKA WALTER.

